I think it might depend upon the goals for the fishery? If trophy bass are the objective, then the eradication of plants might lead to lack of growth, after the LMB decimate the forage base. If trophy BG are in the works, then I'm a fan of reducing plant growth with extreme prejudice, and GC can help in that regard when used appropriately.
You're right, defining one's goals is paramount to success. And in many cases, I do believe GC are utilized as weed control without considering their impact on the fishing as a whole.